• So, what we're looking at here is the force when we have two charged particles, one positive one negative -- here, the nucleus and an electron.

    我们现在研究的,一俩个带电粒子之间的,作用力-在这里。

    麻省理工公开课 - 化学原理课程节选

  • But when we're thinking about actual wave behavior of electrons, it's just important to keep in the back of our head that some areas have positive amplitude and some have negative.

    电子的波动行为时,我们,要记住,某些地方的,某些地方是负的,当我们讲到。

    麻省理工公开课 - 化学原理课程节选

  • And all of that is coming out of the heat of reaction, whether it's positive or negative.

    所有这些都来源于反应热,它可以的或的。

    麻省理工公开课 - 热力学与动力学课程节选

  • We know that this is going to be, by measurement, this is going to be plus and this is going to be minus.

    我们知道通过测量,这儿将,这儿将是负

    麻省理工公开课 - 固态化学导论课程节选

  • So it's like negative 2 billion to positive 2 billion.

    所以大概是负20亿到20亿。

    哈佛公开课 - 计算机科学课程节选

  • If when x is low, y also tends to be low, then this will be negative number and so will this, so their product is positive.

    如果x取值小,同时y值也小,这将一个值,这个也是负值,,结果

    耶鲁公开课 - 金融市场课程节选

  • And it turns out that when you constructively have two p orbitals interfere, and when I say constructively, I mean they're both either positive or they're both the negative lobes, that's when you got bonding.

    当两个p轨道,相长干涉时,我说的相干相长,意思就说它们要么都,的叶瓣要么都是负的叶瓣,这时就能成键。

    麻省理工公开课 - 化学原理课程节选

  • So this one is spin-up plus a half, this is spin-down minus a half.

    所以自旋向上二分之一,而自旋向下是负二分之一。

    麻省理工公开课 - 固态化学导论课程节选

  • Electron affinity, however, can be either negative or it can be positive.

    ,电子亲和能既可以是负的,也可以的。

    麻省理工公开课 - 化学原理课程节选

  • So that's where you have to think about whether it's positive or negative.

    你就要想想,它是负,你们现在不需要。

    麻省理工公开课 - 化学原理课程节选

  • Wrev So minus w reversible, 1 p2 is less than p1, so p2 over p1 is less than one, log of something less than 1 is negative times negative.

    那么,而p2小于p1,p2/p1小于,取对数后是负数,

    麻省理工公开课 - 热力学与动力学课程节选

  • And shielding is a little bit of a misnomer because it's not actually that's the electron's blocking the charge from another electron, it's more like you're canceling out a positive attractive force with a negative repulsive force.

    屏蔽有一点点用词不当,因为它事实上不,电子阻挡了来自另一个电子的电荷,它更像你在用一个排斥力,抵消一个吸引力,但屏蔽考虑这个问题,的很好的方式。

    麻省理工公开课 - 化学原理课程节选

  • So, if we look at the bottom here and the actual plot of the wave function, we see it starts high, very positive, 0 and it goes down 0 and it eventually hits zero, and goes through zero 0 and then becomes negative 0 and then never quite hits zero again, although it approaches zero.

    我们看,这下面这波函数,我们看到它开始很高,的,然后降低直到,然后它穿过,变成的,最后接近,但没达到,在这个。

    麻省理工公开课 - 化学原理课程节选

  • So that is one plus against one minus.

    因此这对一

    麻省理工公开课 - 固态化学导论课程节选

  • But since it is a component it can have a direction, too, so can go up l between negative l and positive l.

    但因为它个分量,它有方向的,所以它可以,从的l一直到的。

    麻省理工公开课 - 化学原理课程节选

  • Delta v is positive in this direction here, the work is negative. So work on the system is positive. Work done by the system is negative.

    是负的,总而言之,外界对系统做功的符号为

    麻省理工公开课 - 热力学与动力学课程节选

  • It's going to be a dipole. This is plus; this is minus.

    个偶极子,这里,这里是负

    麻省理工公开课 - 固态化学导论课程节选

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